Britax Safe-n-Sound Hi-Liner SG



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The tallest E type booster seat on the market is perfect for your growing child! The lifesaving SLIDEGUARD™ clip prevents your children from sliding in an event of a crash.


  • The Hi-Liner SG is the first expandable booster seat designed with slots in the seat cover and shell. This makes it compatible with Safe-n-Sound Protecta PLUS Harness for added safety
  • Your child can use the Hi-Liner SG once their shoulders are in line with the lower shoulder height marker with the headrest in the lowest position.  Your child can continue to use the Hi-Liner SG until their shoulder's reach the upper shoulder height marker with the headrest fully raised
  • A child harness improves upper torso support
  • A swift and easy single-handed adjustment allows the seat to grow with your child
  • Red colour coded seat belt paths
  • The feature helps indicate the path and positioning of seat belt to ensure correct fit
  • From 4 years to 8 years of age (approx.)

Britax Hi Liner User Manual

How to Buckle a Child in a Booster

SKU: 10048 TAGS: Booster Unharnessed, Top Teether

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